Cylinder head for internal-combustion engines



A, BUCHI March 24%, 393E.

CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINES Filed May 5, 1930 2 Sheets-Sheet 1 A BUCHI March 24, 1931.

CYIJTNDER HEAD FOR INTERNAL COMBUSTTON ENGINES Filed May 5, 1930 2 Sheets-Sheet 2 Patented Mar. 24, 1931 UNITED STATES PATENT OFFICE.

ALFRED .Bfi'CHI, OF WINTERTHUR, SWITZERLAND, ASSIGNOR TO SWISS LOCOMOTIVE AND MACHINE WORKS, OF WINTERTHUR, SWITZERLAND, A CORPORATION OF SWITZERLAND CYLINDER HEAD FOR INTERNAL-COMBUSTION ENGINES Application filed May 5, 1930, Serial No. 449,860, and in Switzerland January 23, 1929.

This invention relates to a cylinder head for four-stroke internal combustion engines and consists in providing the head with a rib that projects between the inlet and discharge valves and towards the combustion chamber in such a manner that it deflects the incoming charge towards the face of the piston. The object of this design is to ensure a more uniform distribution of the fuel in the cylinder before its combustion and therefore a more perfect combustion.

The accompanying drawings show by way of example two constructions according to the invention.

Figures 1 and 2 as applied to a vertical and Figures 3 and 4 to a horizontal four-stroke internal combustion engine.

Figure 1 is a vertical and Figure 2 a horizontal section through the cylinder head.

In the cylinder head 1 are arranged two inlet valves 2 and 3, and two discharge valves 4 and 5. The cylinder head is provided with ribs a one of which projects into the combus tion chamber 6 between the inlet valve 2 and discharge valve 4 and the other between the inlet valve 3 and discharge valve 5. These ribs a guide the incoming charge towards the piston face 7 in order that it may be diverted to the side of the discharge valves 4 and 5 as indicated by the arrows.

Figures 3 and 4 show in a similar manner two sections through the head of a horizontal engine, the ribs (1 projecting into the combustion chamber 6 and deflecting the air and fuel mixture towards the face of the piston.

I claim A cylinder head for internal combustion engines comprising an upper wall, an outer peripheral wall depending from said upper wall, an inner chamber forming a valve box and provided with valve ports, the peripheral wall of said chamber being completely free at its lower end from said outer peripheral wall and se arated therefrom by a space, a plurality of inclined ribs connecting the lower end of said chamber to the upper part of said peripheral wall and to the upper wall of the' cylinder head, a plurality of inlet valves controlling the supply-of combustible mixture, a plurality of discharge valves controlling the discharge of said mixture and a plurality of ribs projecting between said inlet and discharge valves into the combustion chamber of the cylinder to ensure a more uniform distribution of the fuel mixture in the cylinder before the combustion and theretorc a more perfect combustion.

Signed at Zurich this 17th day of April, 1930. ALFRED BUGHI. 

